A new method for activation volume measurements: application to Ni3(Al,Hf)
A new method for activation volume measurements: application to Ni3(Al,Hf)
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DOI：
10.1016/0921-5093(93)90339-g
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发表时间：
1993-08
期刊：
影响因子：
6.4
通讯作者：
P. Spätig;J. Bonneville;Jean-Luc Martin
中科院分区：
文献类型：
--
作者：
P. Spätig;J. Bonneville;Jean-Luc Martin
提出了一种新的方法，允许测量微观激活体积，这是典型的热激活位错过程。它包括一个恒定持续时间的重复松弛测试，从给定的应力水平开始。这种方法的优点，相比以前的一个使用恒定的应力降，概述。新方法已成功地应用于测定室温下Ni_3（Al，Hf）合金的宏观塑性变形与微观塑性变形之间的转变应力。
A new method is presented that allows the measurement of microscopic activation volumes which are typical of thermally activated dislocation processes. It consists of a repeated relaxation test with constant durations, which start at a given stress level. The advantages of this method, as compared to a previous one which uses constant stress drops, are outlined. The new method is successfully applied to the determination of the transition stress between micro- and macro-plastic deformation in the alloy Ni3(Al,Hf) at room temperature.